Granted Patent
Utility
US 5,552,152 · App. 08/469,715
Taste masking of ibuprofen by fluid bed coating
Inventor:
Robert Shen
Patented Case
View Patent ↗
Granted: Sep 3, 1996
Filed: Jun 6, 1995
Inventor
Robert Shen
Assignee (at issue)
The Upjohn Co.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.